Other Liabilities (Senior Notes) (Details) - Senior Notes - USD ($)		9 Months Ended	12 Months Ended
Apr. 11, 2012	Dec. 31, 2017	Dec. 31, 2019
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000,000.0
Proceed from senior notes net of offering expenses and underwriting discount	$ 96,600,000
Stated interest rate			8.00%
Effective interest rate			8.31%
Redemption price as percentage of principal amount		100.00%

Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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